News Article | February 21, 2017
LSP Technologies, Inc. (LSPT) announced the sale of its state-of-the-art Procudo® Laser Peening System to the Guangdong University of Technology (GDUT) in Guangzhou, China. The sale includes a 200-watt Procudo® 200 Laser Peening System along with paired work cell and robotic part manipulation equipment for a fully-integrated production-quality laser peening facility. The equipment will be delivered in early 2017, and installed on GDUT’s campus. GDUT will use the system to conduct research and application development on laser peening (LSP), laser peen forming, and laser-material interactions. This sale represents LSP Technologies' introduction into the Asian material improvement market, and the equipment will provide GDUT with the fastest high-energy laser peening system currently available anywhere in the world. The Procudo® 200 Laser Peening System is the highest-power laser peening system in the industry, and the world’s first turn-key laser peening system available for commercial integration. The system offers 20 Hz repetition rates for efficient industrial processing, and an advanced control system for real-time data collection and storage. The embedded diode-pumped laser offers an injection-seeded oscillator with multiple amplifier modules and YLF rod sizes from 3 mm to 25 mm to produce gigawatts of power. The system produces a flat top beam with up to 10 Joules per pulse at a wavelength of 1053 nm. The flexible system offers selectable pulse widths and repetition rates, while delivering consistent outputs with narrow variability. The system is designed for integration with modular work cells for laser-delivery, diagnostics, and part-handling, and can be supplied with a wide range of automated robots and accessories to facilitate laser peening parts of nearly any shape and size. “As the first commercially available laser peening system, it was critically important that we designed and built the Procudo® 200 LSP System to meet the rigorous industrial standards demanded by the aerospace industry,” said Dr. Jeff Dulaney, CEO of LSP Technologies, Inc. “Our engineers have been refining laser peening technology for over twenty years, and this state-of-the-art system represents a culmination of decades of cutting-edge work and innovation in the field. We are very excited to be partnering with such a prestigious institution as GDUT, and we look forward to expanding the availability of laser peening technology in the Asian market through our combined efforts. We expect the data generated from this international effort to fuel the proliferation of laser peening technology throughout China and around the world.” GDUT and LSPT will work together to introduce laser peening technology to China and Asia by bringing leading academics and researchers from the international laser peening community to GDUT for cutting-edge research. Laser peening is a proven method for significantly increasing the fatigue life and fatigue strength of metals. The mechanical surface enhancement process utilizes a high-energy, pulsed laser beam to impart compressive residual stress fields into metal alloys such as titanium or steel. Compressive residual stresses add strength and robustness to metal parts by improving their resistance to damage, fatigue, crack initiation, and crack propagation. Laser peening can even be used to arrest the propagation of existing cracks in fielded components, leading to reduced maintenance and repair costs, longer inspection intervals, and significantly increased service lifetimes. Laser peening has been shown to impart beneficial stresses many times deeper than shot peening, leading to increased damage tolerance, reduced fatigue effects, and superior resistance to stress corrosion cracking. Laser peening is routinely applied to turbine engine blades for commercial and military engine components, as well for turbines used in electrical power generation. The process has been employed for years by major aerospace OEMs such as Rolls Royce on its Trent series engines and GE Aviation to improve turbine engine blade resistance to foreign object damage (FOD), fretting fatigue, and cracking. LSP Technologies is the world’s premier laser peening services, technology, and equipment provider. It is the only company in the world selling, installing, and integrating state-of-the-art laser peening systems into manufacturing and research facilities. The Company has been providing laser peening production services for clients in the aviation and power generation industries for over twenty years, and has been awarded more than fifty patents for innovations in laser peening equipment and technology.
Brockman R.A.,University of Dayton |
Braisted W.R.,University of Dayton |
Olson S.E.,University of Dayton |
Tenaglia R.D.,LSP Technologies, Inc. |
And 3 more authors.
International Journal of Fatigue | Year: 2012
The use of laser shock peening (LSP) to enhance the fatigue resistance of metals offers several potential advantages over more conventional surface enhancement techniques such as shot peening, including deeper penetration of the residual stresses, more reliable surface coverage, and the potential for reduced microstructural damage. In the last decade, computational hardware and software resources have advanced to a state that permits numerical simulation of practical LSP processing at a reasonable level of detail, including complex geometric features, multiple and overlapping laser pulses, and intensity variations within the individual laser spots. This article offers some further developments in simulating LSP processes on a realistic scale, as well as some simple methods for distilling and interpreting results from such simulations. A key point of interest is the local variations in residual stress that occur within the processed region, which are quite sensitive to processing variables, and not easily measured experimentally. The simulations suggest that X-ray diffraction measurements of the residual stress field offer only a coarse description of the final residual stress field, and should be interpreted with some caution. We propose some methods for interpreting the simulation results statistically, to provide a clear but accurate characterization of the surface treatment and its effect on fatigue behavior. © 2011 Published by Elsevier Ltd.
Amarchinta H.K.,Wright State University |
Grandhi R.V.,Wright State University |
Clauer A.H.,LSP Technologies, Inc. |
Langer K.,U.S. Air force |
Stargel D.S.,U.S. Air force
Journal of Materials Processing Technology | Year: 2010
Laser peening (LP) is a surface enhancement technique that induces compressive residual stresses in the surface regions of metallic components to increase fatigue life. Simulation of the LP process is a complex task due to the intensity of the pressure loading (order of GPa) in a very short time period (in nanoseconds). A finite element technique is used to predict the residual stresses induced by the LP process. During the LP process, strain rates could reach as high as 10 6 s -1, which is very high compared to conventional strain rates. A reliable material model is needed to determine the dynamic response of a material. In this work, an optimization-based approach is developed to obtain the material model constants when there is very little or no experimental data of material behavior available. The approach is presented by comparing the residual stress prediction from simulation with available experimental results for Ti-6Al-4V material. To demonstrate the consistency of the approach, LP experiments have been performed at LSP Technologies on Inconel ®718 with different laser power densities, and the residual stress results are compared with the simulation. The Johnson-Cook, the Zerilli-Armstrong, and the Khan-Huang-Liang material models are used during the simulation procedure. The performance of each model is assessed by comparing the residual stress results between simulation and experiments. © 2010 Elsevier B.V. All rights reserved.
Gaydos P.A.,LSP Technologies, Inc. |
Dulaney J.L.,LSP Technologies, Inc.
International Journal of Structural Integrity | Year: 2011
Purpose Sacrificial opaque overlays used in laser peening provide optimal processing and protect the surface of the part being processed from thermal damage from the laser pulses. Traditional solid film overlays for laser peening often require several applications and the running of multiple partial laser peening sequences in order to completely process the desired surface. This paper aims to discuss an automated overlay system that eliminates these issues. Design/methodology/approach LSP Technologies' (LSPT') patented RapidCoater automated overlay system provides optimal laser processing and surface protection by providing a conformal opaque layer that is automatically refreshed between each laser pulses. PLC control provides precise timing of the application of the process overlays in synchronization with the laser pulse. Findings Use of the RapidCoater system has been shown to reduce processing time by up to five times when compared to using tape overlays. Cost reductions of about 40 percent are also achieved. Originality/value LSPT, Inc. invented and developed this proprietary technology to provide its laser peening customers with higher productivity and improved process affordability. © 2011 Emerald Group Publishing Limited. All rights reserved.
LSP Technologies, Inc. | Date: 2014-08-26
LSP Technologies, Inc. | Date: 2010-12-07
The invention relates to a method and apparatus for improving properties of a solid material by providing shockwaves there through. Laser shock processing is used to provide the shockwaves. The method includes applying a liquid energy-absorbing overlay, which is resistant to erosion and dissolution by the transparent water overlay and which is resistant to drying to a portion of the surface of the solid material and then applying a transparent overlay to the coated portion of the solid material. A pulse of coherent laser energy is directed to the coated portion of the solid material to create a shockwave. Advantageously, at least a portion of the unspent energy-absorbing overlay can be reused in situ at a further laser treatment location and/or recovered for later use.
LSP Technologies, Inc. | Date: 2011-02-08
A bend bar is available for use in a quality control test for testing for a consistency of residual stress effects in a particular material using a given a laser peening process. The bar is composed of the particular material to be tested and has a bar length and a bar thickness. The particular material has a characteristic maximum stress penetration depth for compressive residual stresses that can be formed in using the given laser peening process. The bar thickness is chosen so as to be at least twice the characteristic maximum stress penetration depth. The bar has a test surface that extends parallel to the bar length and perpendicular to the bar thickness. After forming a spot pattern on the test surface using the given laser peening process, the deflection generated in the bar due to the compressive residual stresses induced by laser peening can then be measured and used as a quality control measurement.
Agency: Department of Defense | Branch: Defense Advanced Research Projects Agency | Program: SBIR | Phase: Phase I | Award Amount: 150.00K | Year: 2013
Composite structures are the future of aviation. They reduce weight and improve fuel efficiency. Composite structures are now incorporated into aircraft by all major aerospace manufacturers. Many composite structures are assembled with fasteners, but, to meet future design requirements, manufacturers need adhesive bonding for their composite structures. In order for the industry to determine the safety and integrity and certify these aircraft, the adhesive bonds in these structures must be tested to verify the manufacturing process and, in subsequent depot level maintenance to confirm they are still adequate. There is no conventional non-destructive testing method available to assure that the bond strength is adequate for service. An inspection technology developed at LSP Technologies, Inc. offers a solution to evaluate the strength of adhesive bonds in bonded structures. This inspection technique is a local proof-testing method that applies a well-controlled dynamic tensile stress to the composite structure and senses inadequacies of these hard-to-detect weak adhesive bonds in response to the tensile stress. The tensile stress is generated by a pulsed laser beam interaction at the surface of the composite material. The controlled local stressing of the composite material has no effect on the material or properly bonded structures.
Agency: Department of Defense | Branch: Defense Advanced Research Projects Agency | Program: SBIR | Phase: Phase II | Award Amount: 1.00M | Year: 2014
Aerospace manufacturers are using composite structures in aircraft and they are the future of aviation. Composites reduce weight and maintenance costs. Today, many composite structures are joined together with fasteners. However to meet future design r
Agency: Department of Defense | Branch: Navy | Program: SBIR | Phase: Phase I | Award Amount: 80.00K | Year: 2015
Existing repair methodologies for cracked structures aboard US Navy ships are currently limited in efficiency and effectiveness. New repair methodologies that directly address the local stress states leading to fatigue cracking and stress corrosion cracking are possible with laser peening technology. The proposed laser peening solution allows repairs independent of the cracked structure geometry, requires no hazardous chemicals, requires no additional NDI, and does not jeopardize the existing structure or corrosion resistance of the material. To demonstrate this materiel solution, proof of concept is demonstrated through a rigorous coupon testing program that replicates in-service cracking conditions and the treatment of these crack conditions via laser peening. Further technology developmental efforts are focused on identifying requirements, options, and an optimal solution for a portable laser peening system design. The laser peening system concept will be designed to meet the key performance metrics for the laser peening process, the size and mobility requirements for shipboard usage, and the hazard mitigation requirements for laser peening in an open environment. The portable laser peening system is anticipated to achieve significant cost savings in comparison to conventional laser peening systems through the use of commercial off-the-shelf (COTS) components.